Refrigeration – Automatic control – Trapping and discharging refrigerant batches
Patent
1993-01-29
1994-03-29
Wayner, William E.
Refrigeration
Automatic control
Trapping and discharging refrigerant batches
62498, 165 86, 165121, F25B 4100
Patent
active
052973956
ABSTRACT:
A refrigeration cycle has a compressor, an outdoor rotary-type heat exchanger, a motor-operated expansion valve, and an indoor rotary-type heat exchanger which are sequentially connected to each other to circulate a refrigerant. A tank is set in a connected state or a non-connected state with respect to a refrigerant discharge side of the compressor. A detector detects at least a pressure at one side of each of the exchangers. A first controller sets the tank in a non-connected state when a normal operation of an air conditioner is to be started, and controls the capacity of the compressor, the rotational speed of the exchangers, and the opening degree of the valve in accordance with an air-conditioning load, thereby performing the normal operation of the air conditioner. A second controller causes the compressor to keep operating at a predetermined capacity until a detection pressure from the detector coincides with a preset value, when the air conditioner is to be stopped, and sets the tank in a connected state while controlling the valve to a predetermined opening degree, thereby recovering a refrigerant in the tank. A third controller rotates the exchangers at a predetermined speed when the air conditioner is to be started, and sets the tank in a connected state while controlling the valve to a predetermined opening degree, thereby filling the refrigerant in the exchangers from the tank.
REFERENCES:
patent: 3696634 (1972-10-01), Ludin et al
patent: 4986345 (1991-01-01), Uemura et al.
patent: 5140827 (1992-08-01), Reedy
Akiyama Kazuhiko
Hiruma Atsuyuki
Hoshi Takao
Isshiki Masao
Kawai Nobuo
Kabushiki Kaisha Toshiba
Wayner William E.
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